Yes you definitely will have to go to the salon and not be able to do it yourself. Depending on how dark you go and then how light you may then decide to go they may have to "strip" the dark color out of your hair first. It all depends though on the color shades.RoCkin_You said:Im currently thinking of doing the same thing..going from a dirty blonde to a darker brown. Does anyone know if its hard to go back to blonde if I dont like it?